From 69e43ddb19cd0f55a6f5a2a1578684e99022d55f Mon Sep 17 00:00:00 2001
From: raphaelgurtner <raphaelgurtner@gmx.ch>
Date: Fri, 14 Nov 2025 13:04:49 +0100
Subject: [PATCH] use websearch_to_tsquery + regexp_replace for ts-query
 creation

produces ts queries with logical OR instead of logical AND
---
 langchain_postgres/v2/async_vectorstore.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/langchain_postgres/v2/async_vectorstore.py b/langchain_postgres/v2/async_vectorstore.py
index c83930e..fce62bc 100644
--- a/langchain_postgres/v2/async_vectorstore.py
+++ b/langchain_postgres/v2/async_vectorstore.py
@@ -650,7 +650,7 @@ async def __query_collection(
                 if hybrid_search_config.tsv_lang
                 else ""
             )
-            query_tsv = f"plainto_tsquery({lang} :fts_query)"
+            query_tsv = fr"websearch_to_tsquery({lang} regexp_replace(:fts_query, '\s', ' OR ', 'g'))"
             param_dict["fts_query"] = fts_query
             if hybrid_search_config.tsv_column:
                 content_tsv = f'"{hybrid_search_config.tsv_column}"'